J.P. Morgan's Dimon to Keep Twin roles

NEW YORK—J.P. Morgan Chase & Co.'s James Dimon held on to both the chairman and chief executive jobs despite a shareholder proposal to split the roles at the nation's biggest bank.

Shareholders rejected the recommendation during the bank's annual shareholders meeting, which clocked in at a little more than three hours. The proposal—backed by the pension fund California Public Employees' Retirement System, or Calpers—was...